ADC HRM-238 L1 Manuel D’Utilisation

With two HMU-319 management units installed, the HRM-238 shelf provides network management for up to 56 
HiGain line units. 

The configuration shown in 

 is the recommended setup for 220 type mechanics shelves. Position the 

HRM-238 shelf between the 220 type shelves, with up to two 220-type shelves above and two below. This limits 
the distance for the wire leads between the connectors for the management units and the line units they manage. 

 shows the HRM-238 shelf from the rear view with the A-side connectors on the right and the B-side 

connectors on the left. The leads from the HRM-238 shelf connector attach to the Network Management Agent 
(NMA) pins on the rear of the 220-type mechanics shelves for each line unit managed. The NMA pin on 220 type 
chassis is pin 46.

-48V A

-48V A

-48V A

-48V A

-48V B

-48V B

-48V B

-48V B

NMA 1 to 14 B

NMA 15 to 28 B

NMA 1 to 28 B

NMA 1 to 14 A

Network B

Network A

TB1

CO -48V

Supply

NMA 15 to 28 A

NMA 1 to 28 A

H0544-B